Carence en vitamine B12 : Questions médicales fréquentes
Nom anglais: Vitamin B 12 Deficiency
Descriptor UI:D014806
Tree Number:C18.654.521.500.133.699.923
Termes MeSH sélectionnés :
Occupational Exposure
{
"@context": "https://schema.org",
"@graph": [
{
"@type": "MedicalWebPage",
"name": "Carence en vitamine B12 : Questions médicales les plus fréquentes",
"headline": "Carence en vitamine B12 : Comprendre les symptômes, diagnostics et traitements",
"description": "Guide complet et accessible sur les Carence en vitamine B12 : explications, diagnostics, traitements et prévention. Information médicale validée destinée aux patients.",
"datePublished": "2024-03-25",
"dateModified": "2025-03-20",
"inLanguage": "fr",
"medicalAudience": [
{
"@type": "MedicalAudience",
"name": "Grand public",
"audienceType": "Patient",
"healthCondition": {
"@type": "MedicalCondition",
"name": "Carence en vitamine B12"
},
"suggestedMinAge": 18,
"suggestedGender": "unisex"
},
{
"@type": "MedicalAudience",
"name": "Médecins",
"audienceType": "Physician",
"geographicArea": {
"@type": "AdministrativeArea",
"name": "France"
}
},
{
"@type": "MedicalAudience",
"name": "Chercheurs",
"audienceType": "Researcher",
"geographicArea": {
"@type": "AdministrativeArea",
"name": "International"
}
}
],
"reviewedBy": {
"@type": "Person",
"name": "Dr Olivier Menir",
"jobTitle": "Expert en Médecine",
"description": "Expert en Médecine, Optimisation des Parcours de Soins et Révision Médicale",
"url": "/static/pages/docteur-olivier-menir.html",
"alumniOf": {
"@type": "EducationalOrganization",
"name": "Université Paris Descartes"
}
},
"isPartOf": {
"@type": "MedicalWebPage",
"name": "Carence en vitamines B",
"url": "https://questionsmedicales.fr/mesh/D014804",
"about": {
"@type": "MedicalCondition",
"name": "Carence en vitamines B",
"code": {
"@type": "MedicalCode",
"code": "D014804",
"codingSystem": "MeSH"
},
"identifier": {
"@type": "PropertyValue",
"propertyID": "MeSH Tree",
"value": "C18.654.521.500.133.699"
}
}
},
"hasPart": [
{
"@type": "MedicalWebPage",
"name": "Anémie pernicieuse",
"alternateName": "Anemia, Pernicious",
"url": "https://questionsmedicales.fr/mesh/D000752",
"about": {
"@type": "MedicalCondition",
"name": "Anémie pernicieuse",
"code": {
"@type": "MedicalCode",
"code": "D000752",
"codingSystem": "MeSH"
},
"identifier": {
"@type": "PropertyValue",
"propertyID": "MeSH Tree",
"value": "C18.654.521.500.133.699.923.280"
}
}
}
],
"about": {
"@type": "MedicalCondition",
"name": "Carence en vitamine B12",
"alternateName": "Vitamin B 12 Deficiency",
"code": {
"@type": "MedicalCode",
"code": "D014806",
"codingSystem": "MeSH"
}
},
"author": [
{
"@type": "Person",
"name": "Dorota Gryko",
"url": "https://questionsmedicales.fr/author/Dorota%20Gryko",
"affiliation": {
"@type": "Organization",
"name": "Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland. dorota.gryko@icho.edu.pl."
}
},
{
"@type": "Person",
"name": "Jacob Selhub",
"url": "https://questionsmedicales.fr/author/Jacob%20Selhub",
"affiliation": {
"@type": "Organization",
"name": ""
}
},
{
"@type": "Person",
"name": "Setareh Shahab-Ferdows",
"url": "https://questionsmedicales.fr/author/Setareh%20Shahab-Ferdows",
"affiliation": {
"@type": "Organization",
"name": "Department of Agriculture, Agricultural Research Service, Western Human Nutrition Research Center, Davis, CA, United States."
}
},
{
"@type": "Person",
"name": "Daniela Hampel",
"url": "https://questionsmedicales.fr/author/Daniela%20Hampel",
"affiliation": {
"@type": "Organization",
"name": "Department of Agriculture, Agricultural Research Service, Western Human Nutrition Research Center, Davis, CA, United States; Department of Nutrition, University of California, Davis, CA, United States."
}
},
{
"@type": "Person",
"name": "Lindsay H Allen",
"url": "https://questionsmedicales.fr/author/Lindsay%20H%20Allen",
"affiliation": {
"@type": "Organization",
"name": "Department of Agriculture, Agricultural Research Service, Western Human Nutrition Research Center, Davis, CA, United States."
}
}
],
"citation": [
{
"@type": "ScholarlyArticle",
"name": "An Innovative Tool to Control Occupational Radon Exposure.",
"datePublished": "2022-09-08",
"url": "https://questionsmedicales.fr/article/36141555",
"identifier": {
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.3390/ijerph191811280"
}
},
{
"@type": "ScholarlyArticle",
"name": "Environmental and occupational exposures in interstitial lung disease.",
"datePublished": "2022-07-16",
"url": "https://questionsmedicales.fr/article/35838370",
"identifier": {
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.1097/MCP.0000000000000894"
}
},
{
"@type": "ScholarlyArticle",
"name": "Occupational Exposures and Esophageal Cancer: Prog Study.",
"datePublished": "2022-08-09",
"url": "https://questionsmedicales.fr/article/36011418",
"identifier": {
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.3390/ijerph19169782"
}
},
{
"@type": "ScholarlyArticle",
"name": "[Occupational Health Nurses' Role in the Occupational Health Surveillance of Exposure to Toxics: Toluene as a Case Study].",
"datePublished": "2023-10-17",
"url": "https://questionsmedicales.fr/article/37859491",
"identifier": {
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.12961/aprl.2023.26.04.04"
}
},
{
"@type": "ScholarlyArticle",
"name": "Occupational Silica Exposure as a Potential Risk for Microscopic Polyangiitis.",
"datePublished": "2023-08-19",
"url": "https://questionsmedicales.fr/article/37604751",
"identifier": {
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.1016/j.wem.2023.06.012"
}
}
],
"breadcrumb": {
"@type": "BreadcrumbList",
"itemListElement": [
{
"@type": "ListItem",
"position": 1,
"name": "questionsmedicales.fr",
"item": "https://questionsmedicales.fr"
},
{
"@type": "ListItem",
"position": 2,
"name": "Maladies métaboliques et nutritionnelles",
"item": "https://questionsmedicales.fr/mesh/D009750"
},
{
"@type": "ListItem",
"position": 3,
"name": "Troubles nutritionnels",
"item": "https://questionsmedicales.fr/mesh/D009748"
},
{
"@type": "ListItem",
"position": 4,
"name": "Malnutrition",
"item": "https://questionsmedicales.fr/mesh/D044342"
},
{
"@type": "ListItem",
"position": 5,
"name": "Maladies de carence",
"item": "https://questionsmedicales.fr/mesh/D003677"
},
{
"@type": "ListItem",
"position": 6,
"name": "Avitaminoses",
"item": "https://questionsmedicales.fr/mesh/D001361"
},
{
"@type": "ListItem",
"position": 7,
"name": "Carence en vitamines B",
"item": "https://questionsmedicales.fr/mesh/D014804"
},
{
"@type": "ListItem",
"position": 8,
"name": "Carence en vitamine B12",
"item": "https://questionsmedicales.fr/mesh/D014806"
}
]
}
},
{
"@type": "MedicalWebPage",
"name": "Article complet : Carence en vitamine B12 - Questions et réponses",
"headline": "Questions et réponses médicales fréquentes sur Carence en vitamine B12",
"description": "Une compilation de questions et réponses structurées, validées par des experts médicaux.",
"datePublished": "2025-05-04",
"inLanguage": "fr",
"hasPart": [
{
"@type": "MedicalWebPage",
"name": "Diagnostic",
"headline": "Diagnostic sur Carence en vitamine B12",
"description": "Comment diagnostiquer une carence en vitamine B12 ?\nQuels tests sont utilisés pour confirmer la carence ?\nQuels signes cliniques indiquent une carence ?\nLa carence en B12 peut-elle être asymptomatique ?\nQuel rôle joue l'historique médical dans le diagnostic ?",
"url": "https://questionsmedicales.fr/mesh/D014806?mesh_terms=Occupational+Exposure&page=2#section-diagnostic"
},
{
"@type": "MedicalWebPage",
"name": "Symptômes",
"headline": "Symptômes sur Carence en vitamine B12",
"description": "Quels sont les symptômes courants de la carence en B12 ?\nLa carence en B12 peut-elle causer des problèmes neurologiques ?\nComment la carence affecte-t-elle la peau ?\nY a-t-il des symptômes digestifs associés ?\nLes symptômes varient-ils selon l'âge ?",
"url": "https://questionsmedicales.fr/mesh/D014806?mesh_terms=Occupational+Exposure&page=2#section-symptômes"
},
{
"@type": "MedicalWebPage",
"name": "Prévention",
"headline": "Prévention sur Carence en vitamine B12",
"description": "Comment prévenir la carence en vitamine B12 ?\nLes personnes âgées doivent-elles prendre des suppléments ?\nLes végétaliens peuvent-ils éviter la carence ?\nLes tests réguliers sont-ils recommandés ?\nLes maladies digestives augmentent-elles le risque ?",
"url": "https://questionsmedicales.fr/mesh/D014806?mesh_terms=Occupational+Exposure&page=2#section-prévention"
},
{
"@type": "MedicalWebPage",
"name": "Traitements",
"headline": "Traitements sur Carence en vitamine B12",
"description": "Comment traiter une carence en vitamine B12 ?\nQuelle est la durée du traitement ?\nLes aliments peuvent-ils aider à corriger la carence ?\nLes personnes végétariennes sont-elles à risque ?\nLes traitements sont-ils différents pour les enfants ?",
"url": "https://questionsmedicales.fr/mesh/D014806?mesh_terms=Occupational+Exposure&page=2#section-traitements"
},
{
"@type": "MedicalWebPage",
"name": "Complications",
"headline": "Complications sur Carence en vitamine B12",
"description": "Quelles complications peuvent survenir ?\nLa carence peut-elle entraîner des problèmes cognitifs ?\nY a-t-il un risque accru de maladies cardiovasculaires ?\nLes complications sont-elles réversibles ?\nLa carence en B12 peut-elle affecter la grossesse ?",
"url": "https://questionsmedicales.fr/mesh/D014806?mesh_terms=Occupational+Exposure&page=2#section-complications"
},
{
"@type": "MedicalWebPage",
"name": "Facteurs de risque",
"headline": "Facteurs de risque sur Carence en vitamine B12",
"description": "Qui est le plus à risque de carence en B12 ?\nLes maladies auto-immunes augmentent-elles le risque ?\nLes médicaments peuvent-ils influencer le risque ?\nLes troubles digestifs sont-ils un facteur de risque ?\nLes antécédents familiaux jouent-ils un rôle ?",
"url": "https://questionsmedicales.fr/mesh/D014806?mesh_terms=Occupational+Exposure&page=2#section-facteurs de risque"
}
]
},
{
"@type": "FAQPage",
"mainEntity": [
{
"@type": "Question",
"name": "Comment diagnostiquer une carence en vitamine B12 ?",
"position": 1,
"acceptedAnswer": {
"@type": "Answer",
"text": "Un diagnostic se fait par des analyses sanguines mesurant les niveaux de vitamine B12."
}
},
{
"@type": "Question",
"name": "Quels tests sont utilisés pour confirmer la carence ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les tests incluent la mesure de la vitamine B12, de l'homocystéine et de la méthylmalonyl-CoA."
}
},
{
"@type": "Question",
"name": "Quels signes cliniques indiquent une carence ?",
"position": 3,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des signes comme l'anémie, la fatigue, et des troubles neurologiques peuvent indiquer une carence."
}
},
{
"@type": "Question",
"name": "La carence en B12 peut-elle être asymptomatique ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certaines personnes peuvent avoir une carence sans présenter de symptômes visibles."
}
},
{
"@type": "Question",
"name": "Quel rôle joue l'historique médical dans le diagnostic ?",
"position": 5,
"acceptedAnswer": {
"@type": "Answer",
"text": "L'historique médical aide à identifier des facteurs de risque comme des troubles d'absorption."
}
},
{
"@type": "Question",
"name": "Quels sont les symptômes courants de la carence en B12 ?",
"position": 6,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les symptômes incluent fatigue, faiblesse, engourdissements et troubles de l'humeur."
}
},
{
"@type": "Question",
"name": "La carence en B12 peut-elle causer des problèmes neurologiques ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elle peut entraîner des troubles neurologiques comme des démences ou des neuropathies."
}
},
{
"@type": "Question",
"name": "Comment la carence affecte-t-elle la peau ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Elle peut provoquer des changements cutanés comme une pâleur ou des lésions cutanées."
}
},
{
"@type": "Question",
"name": "Y a-t-il des symptômes digestifs associés ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des symptômes comme des nausées, des diarrhées ou des troubles digestifs peuvent survenir."
}
},
{
"@type": "Question",
"name": "Les symptômes varient-ils selon l'âge ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les symptômes peuvent être plus prononcés chez les personnes âgées en raison de l'absorption réduite."
}
},
{
"@type": "Question",
"name": "Comment prévenir la carence en vitamine B12 ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une alimentation équilibrée incluant des sources de B12 et des suppléments si nécessaire aide."
}
},
{
"@type": "Question",
"name": "Les personnes âgées doivent-elles prendre des suppléments ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les personnes âgées peuvent avoir besoin de suppléments en raison d'une absorption réduite."
}
},
{
"@type": "Question",
"name": "Les végétaliens peuvent-ils éviter la carence ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils doivent prendre des suppléments de B12 ou consommer des aliments enrichis pour éviter la carence."
}
},
{
"@type": "Question",
"name": "Les tests réguliers sont-ils recommandés ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des tests réguliers sont conseillés pour les personnes à risque de carence."
}
},
{
"@type": "Question",
"name": "Les maladies digestives augmentent-elles le risque ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des maladies comme la maladie de Crohn peuvent affecter l'absorption de la vitamine B12."
}
},
{
"@type": "Question",
"name": "Comment traiter une carence en vitamine B12 ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Le traitement inclut des suppléments oraux ou des injections de vitamine B12 selon la gravité."
}
},
{
"@type": "Question",
"name": "Quelle est la durée du traitement ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "La durée dépend de la gravité, mais peut durer de quelques mois à plusieurs années."
}
},
{
"@type": "Question",
"name": "Les aliments peuvent-ils aider à corriger la carence ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, consommer des aliments riches en B12 comme la viande, le poisson et les produits laitiers aide."
}
},
{
"@type": "Question",
"name": "Les personnes végétariennes sont-elles à risque ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles peuvent être à risque en raison d'un apport alimentaire limité en vitamine B12."
}
},
{
"@type": "Question",
"name": "Les traitements sont-ils différents pour les enfants ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les traitements sont similaires, mais les doses peuvent varier selon l'âge et le poids."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des complications incluent l'anémie mégaloblastique, des troubles neurologiques et des problèmes cardiaques."
}
},
{
"@type": "Question",
"name": "La carence peut-elle entraîner des problèmes cognitifs ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une carence prolongée peut causer des troubles cognitifs et des pertes de mémoire."
}
},
{
"@type": "Question",
"name": "Y a-t-il un risque accru de maladies cardiovasculaires ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une carence en B12 peut augmenter le risque de maladies cardiovasculaires en élevant l'homocystéine."
}
},
{
"@type": "Question",
"name": "Les complications sont-elles réversibles ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines complications peuvent être réversibles avec un traitement approprié, d'autres non."
}
},
{
"@type": "Question",
"name": "La carence en B12 peut-elle affecter la grossesse ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elle peut entraîner des complications pendant la grossesse, comme des malformations congénitales."
}
},
{
"@type": "Question",
"name": "Qui est le plus à risque de carence en B12 ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les personnes âgées, les végétariens, et ceux ayant des troubles d'absorption sont à risque."
}
},
{
"@type": "Question",
"name": "Les maladies auto-immunes augmentent-elles le risque ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des maladies comme la gastrite atrophique peuvent affecter l'absorption de la B12."
}
},
{
"@type": "Question",
"name": "Les médicaments peuvent-ils influencer le risque ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certains médicaments comme les inhibiteurs de la pompe à protons peuvent réduire l'absorption."
}
},
{
"@type": "Question",
"name": "Les troubles digestifs sont-ils un facteur de risque ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des troubles comme la maladie cœliaque peuvent nuire à l'absorption de la vitamine B12."
}
},
{
"@type": "Question",
"name": "Les antécédents familiaux jouent-ils un rôle ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des antécédents familiaux de carence peuvent augmenter le risque chez certains individus."
}
}
]
}
]
}
After smoking, indoor radon is the main contributor to lung cancer in many countries. The European Union (EU) Directive 2013/59/Euratom establishes a maximum reference level of 300 Bq/m...
We highlight recent advances in the understanding of how environmental and occupational exposures increase the risk of developing interstitial lung disease (ILD), and how to evaluate a patient for pot...
A review of emerging literature suggests that environmental and occupational exposures can be directly causal, as in the case of the pneumoconioses and smoking-related ILDs, or one of many contributor...
Inhalational exposures are increasingly recognized as an important component in the development of ILDs, and novel exposure-disease associations continue to be discovered. These exposures represent po...
Esophageal cancer is the sixth most common cause of cancer death worldwide. In France, Brittany is one of the regions most seriously affected. This increased incidence is usually linked to high rates ...
Toluene, an aromatic hydrocarbon present in various products, is primarily absorbed through the respiratory tract and can affect different body organs. Occupational health nurses play a key role in de...
We reviewed the existing literature linking toluene and occupational health nursing, identified sample collection and processing requirements, as well as signs and symptoms of exposure, and related th...
We conducted a literature search using the PICO strategy, without limitations on document type, date, or language, in PubMed, Web of Science, and Scopus databases. Signs and symptoms were classified a...
We found no studies linking toluene and occupational health nursing. Seven out of 60 identified documents were selected, which provided information on sample collection requirements. Signs and symptom...
The presence of occupational health nursing in studies on toluene is scarce. Sample collection criteria are heterogeneous and limited. There were no studies relating signs and symptoms of toluene expo...
Microscopic polyangiitis is an important and common component of cytoplasmic antibody-associated vasculitides that can lead to serious morbidity and even death. A clear causative etiology has not been...
Inadequate sleep has been linked to a variety of impairments in bodily functions, including endocrine, metabolic, higher cortical function, and neurological disorders. For this reason, the aim of this...
The Special Issue "Toxicology, Nanotoxicology and Occupational Diseases" of the International Journal of Molecular Sciences includes six articles presenting the results of recent experimental studies ...
Electronic repair workers may be exposed to lead, mercury, cadmium and other elements including rare earth elements used in electronic equipment. In this study, repair work took place in small repair ...
This study assessed microorganisms in personal inhalable work air samples aiming to identify potential human pathogens, and correlate exposure to adverse health outcomes in waste workers. Full-shift p...
As a by-product or material used in various industries crystalline silica contaminates the air many occupational settings. If its fine particles are inhaled, they are deposited in the lungs and may ca...